Mastering AutoCAD 2019 and AutoCAD LT 2019

By George Omura and Brian C. Benton

The world’s favorite guide to everything AutoCAD and AutoCAD LT—updated for 2019!

Mastering AutoCAD 2019 and AutoCAD LT 2019 is the world’s all-time best-selling guide to the world’s most popular drafting software. Packed with tips, tricks, techniques, and tutorials, this guide covers every inch of AutoCAD and AutoCAD LT—including certification. This new edition has been fully updated to align with the software’s 2019 update, featuring the same expert instruction augmented by videos of crucial techniques. Step-by-step walk-throughs, concise explanations, specific examples and plenty of hands-on projects help you learn essential AutoCAD skills by working directly with the necessary tools—giving you a skill set that translates directly to on-the-job use.

AutoCAD is the dominant design and drafting software for 2D and 3D technical drawings, while AutoCAD LT is the more affordable version often used by students and hobbyists. Professional designers need complete command of the software’s tools and functions, but a deeper exploration of more complex capabilities can help even hobbyists produce work at a higher level of technical proficiency. This book is your ultimate guide to AutoCAD and AutoCAD LT, whether you’re seeking certification or just looking to draw.

• Get acquainted with the workspace and basic drafting tools
• Gain greater control of your drawings with hatches, fields, fills, dynamic blocks, and curves
• Explore the 3D modeling and imaging tools that bring your drawing to life

• Customize AutoCAD to the way you work, integrate it with other software, and more

As certification preparation material, this book is Autodesk-endorsed; as a self-study guide to AutoCAD and AutoCAD LT mastery, this book is the gold-standard, having led over a half million people on the journey to better design. If you’re ready to learn quickly so you can get down to work, Mastering AutoCAD 2019 and AutoCAD LT 2019 is your ideal resource.

• Language: English
• Publisher: Wiley
• Release date: May 30, 2018
• ISBN: 9781119495031

Book preview

Acknowledgments

Many talented and hardworking people gave their best effort to produce Mastering AutoCAD 2019 and AutoCAD LT 2019. I offer my sincerest gratitude to those individuals who helped bring this book to you.

Heartfelt thanks go out to the editorial and production teams at Sybex for their efforts. Jim Minatel made sure things got off to a great start and provided support from beginning to end. Karthiga Mani skillfully managed the development process. Richard Hawley did an excellent technical editing job and offered many great suggestions. On the production side, Athiyappan Lalith Kumar kept the production end of things running smoothly.

Thanks also go to Denis Cadu, who has always given his support to our efforts over many projects. Jim Quanci always gives his generous and thoughtful assistance to us author types. Thanks to Elinor Actipis for providing help with general Autodesk matters. Finally, thanks go to Alison Keller, Daniel Kuhman, and KB Lee of the AutoCAD Customer Counsel and the AutoCAD team for generously allowing us to have a look at the prerelease software.

And a great big thank you to my family and friends, who have been there for me through thick and thin.

About the Authors

George Omura is a licensed architect, Autodesk Authorized Author, and CAD specialist with more than 30 years of experience in AutoCAD and over 40 years of experience in architecture. He has worked on design projects ranging from resort hotels to metropolitan transit systems. George has written numerous other AutoCAD books for Sybex, including Mastering AutoCAD 2018 and AutoCAD LT 2018.

Brian C. Benton is a CAD manager, CAD service provider, technical writer, and blogger. He has over 20 years of experience in various design fields (mechanical, structural, civil, survey, marine, environmental) and is well versed in many design software packages (CAD, GIS, and graphics). He has been Cadalyst magazine's Tip Patroller, AUGI HotNews production manager, and Infinite Skills' AutoCAD training video author.

Introduction

Welcome to Mastering AutoCAD 2019 and AutoCAD LT 2019. As many readers have already discovered, this book is a unique blend of tutorial and reference, which includes everything that you need to get started and stay ahead with Autodesk® AutoCAD® software. With this edition, you get coverage of the latest features of both AutoCAD 2019 and AutoCAD LT® 2019 software along with detailed information on existing features.

How to Use This Book

Rather than just showing you how each command works, this book shows you AutoCAD 2019 in the context of a meaningful activity. You'll learn how to use commands while working on an actual project and progressing toward a goal. This book also provides a foundation on which you can build your own methods for using AutoCAD and become an AutoCAD expert. For this reason, we haven't covered every single command or every permutation of a command response. You should think of this book as a way to get a detailed look at AutoCAD as it's used on a real project. As you follow the exercises, we also encourage you to explore AutoCAD on your own, applying the techniques that you learn to your own work.

Both experienced and beginning AutoCAD users will find this book useful. If you aren't an experienced user, the way to get the most out of this book is to approach it as a tutorial—chapter by chapter—at least for the first two parts of the book. You'll find that each chapter builds on the skills and information that you learned in the previous one. To help you navigate, the exercises are shown in numbered steps. To address the needs of all readers worldwide, the exercises provide both Imperial (feet/inches) and metric measurements. Some exercises use generic units of measurement, and if the focus of the exercise is not dependent on the measurement system, Imperial is used.

After you've mastered the material in Part 1 and Part 2, you can follow your interests and explore other parts of the book in whatever order you choose. Part 3 takes you to a more advanced skill level. There you'll learn more about storing and sharing drawing data and how to create more complex drawings. If you're interested in 3D, check out Part 4. If you want to start customizing right away, go to Part 5. You can check out Chapter 25 at any time because it gives you general information about sharing AutoCAD files with your co‐workers and consultants. You can also use this book as a ready reference for your day‐to‐day problems and questions about commands. The Bottom Line section at the end of each chapter will help you review and look at different ways to apply the information that you've learned. Experienced users will also find this book a handy reference tool.

Finally, you can learn more about AutoCAD through the author‐supplied bonus chapters found at www.omura.com/chapters. For example, if you run into problems using AutoCAD, see the section When Things Go Wrong in Bonus Chapter 3, Hardware and Software Tips. To delve into the details of printers and plotting, check out Bonus Chapter 5, Understanding Plot Styles.

AutoCAD and AutoCAD LT 2019

Autodesk has released AutoCAD 2019 and AutoCAD LT 2019 simultaneously. Not surprisingly, they're nearly identical in the way they look and work. You can share files between the two programs with complete confidence that you won't lose data or corrupt files. The main differences are that AutoCAD LT doesn't support all of the 3D functions of AutoCAD 2019, nor does it support the customization tools of AutoLISP® or the .NET Framework. But AutoCAD LT still has plenty to offer in both the productivity and customization areas. Because they're so similar, we can present material for both programs with only minor adjustments.

When a feature is discussed that is available only in AutoCAD 2019, you'll see the AutoCAD Only icon. For the purposes of this publication, the ACAD only icon means that the relevant (or adjacent) content applies only to AutoCAD software and not to AutoCAD LT software.

You'll also see warning messages when tutorials vary between AutoCAD 2019 and AutoCAD LT. If only minor differences occur, you'll see either a warning message or directions embedded in the exercise indicating the differences between the two programs.

We've also provided workaround instructions wherever possible when AutoCAD LT doesn't offer a feature found in AutoCAD 2019.

Getting Information Fast

In each chapter, you'll find extensive tips and discussions in the form of sidebars set off from the main text. These provide a wealth of information that we have gathered over years of using AutoCAD on a variety of projects in different office environments. You may want to browse through the book and read these boxes just to get an idea of how they might be useful to you.

Another available quick reference is Bonus Chapter 4, System Variables and Dimension Styles. It contains descriptions of all the dimension settings with comments on their uses. If you experience any problems, you can consult the section When Things Go Wrong in Bonus Chapter 3, Hardware and Software Tips.

The Mastering Series

The Mastering series from Sybex provides outstanding instruction for readers with intermediate and advanced skills in the form of top‐notch training and development for those already working in their field, and clear, serious education for those aspiring to become pros. Every Mastering book includes the following:

Skill‐based instruction with chapters organized around real tasks rather than abstract concepts or subjects

Self‐review test questions so that you can be certain you're equipped to do the job right

What to Expect

Mastering AutoCAD 2019 and AutoCAD LT 2019 is divided into five parts, each representing a milestone in your progress toward becoming an expert AutoCAD user. Here is a description of those parts and what they will show you.

Part 1: The Basics

As with any major endeavor, you must begin by tackling small, manageable tasks. In this first part, you'll become familiar with the way that AutoCAD looks and feels.

Chapter 1, Exploring the Interface, shows you how to get around in AutoCAD.

Chapter 2, Creating Your First Drawing, details how to start and exit the program and how to respond to AutoCAD commands.

Chapter 3, Setting Up and Using the Drafting Tools, tells you how to set up a work area, edit objects, and lay out a drawing.

Chapter 4, Organizing Objects with Blocks and Groups, explores some tools unique to CAD: symbols, blocks, and layers. As you're introduced to AutoCAD, you'll also get a chance to make some drawings that you can use later in the book and perhaps even in your future projects.

Chapter 5, Keeping Track of Layers and Blocks, shows you how to use layers to keep similar information together and object properties such as linetypes to organize things visually.

Part 2: Mastering Intermediate Skills

After you have the basics down, you'll begin to explore some of the subtler qualities of AutoCAD.

Chapter 6, Editing and Reusing Data to Work Efficiently, tells you how to reuse drawing setup information and parts of an existing drawing.

Chapter 7, Mastering Viewing Tools, Hatches, and External References, details how to use viewing tools and hatches and how to assemble and edit a large drawing file.

Chapter 8, Introducing Printing, Plotting, and Layouts, shows you how to get your drawing onto hard copy.

Chapter 9, Adding Text to Drawings, tells you how to annotate your drawing and edit your notes.

Chapter 10, Using Fields and Tables, shows you how to add spreadsheet functionality to your drawings.

Chapter 11, Using Dimensions, gives you practice in using automatic dimensioning (another unique CAD capability).

Part 3: Mastering Advanced Skills

At this point, you'll be on the verge of becoming a real AutoCAD expert. Part 3 is designed to help you polish your existing skills and give you a few new ones.

Chapter 12, Using Attributes, tells you how to attach information to drawing objects and how to export that information to database and spreadsheet files.

Chapter 13, Copying Existing Drawings from Other Sources, details techniques for transferring paper drawings to AutoCAD. You'll also learn how to include aerial and map views in your drawings.

Chapter 14, Advanced Editing and Organizing, is where you'll complete the apartment building tutorial. During this process, you'll learn how to integrate what you've learned so far and gain some tips on working in groups.

Chapter 15, Laying Out Your Printer Output, shows you the tools that let you display your drawing in an organized fashion.

Chapter 16, Making ‘Smart’ Drawings with Parametric Tools, introduces you to parametric drawing. This feature lets you quickly modify a drawing by changing a few parameters.

Chapter 17, Using Dynamic Blocks, shows you how you can create blocks that can be edited with grips without having to redefine them.

Chapter 18, Drawing Curves, gives you an in‐depth look at some special drawing objects, such as splines and fitted curves.

Chapter 19, Getting and Exchanging Data from Drawings, is where you'll practice getting information about a drawing and learn how AutoCAD can interact with other applications, such as spreadsheets and page layout programs. You'll also learn how to copy and paste data.

Part 4: 3D Modeling and Imaging

Although 2D drafting is the workhorse application in AutoCAD, its 3D capabilities give you a chance to expand your ideas and look at them in a new light.

Chapter 20, Creating 3D Drawings, covers basic features for creating three‐dimensional drawings.

Chapter 21, Using Advanced 3D Features, introduces you to some of the program's more powerful 3D capabilities.

Chapter 22, Editing and Visualizing 3D Solids, takes a closer look at 3D solids and how they can be created, edited, and displayed in AutoCAD 2019.

Chapter 23, Exploring 3D Mesh and Surface Modeling, introduces you to free‐form 3D modeling using mesh and surface objects. With the latest additions to the 3D feature set in AutoCAD, there isn't anything you can't model in 3D.

Part 5: Customization and Integration

One of the greatest strengths of AutoCAD is its openness to customization, which you'll explore in this section.

Chapter 24, Customizing Toolbars, Menus, Linetypes, and Hatch Patterns, shows you how to use workspaces, customize the user interface, and create custom linetypes and hatch patterns. You'll also be introduced to the DIESEL macro language.

Chapter 25, Managing and Sharing Your Drawings, shows you how to adapt AutoCAD to your own work style. You'll learn about the tools that help you exchange drawings with others and how to secure your drawings to prevent tampering.

Part 6: Appendixes

Finally, this book has several appendixes.

Appendix A, The Bottom Line, contains the solutions to the book's Master It review questions.

Appendix B, Installing and Setting Up AutoCAD, contains an installation and configuration tutorial. If AutoCAD isn't already installed on your system, follow the steps in this tutorial before starting Chapter 1.

Appendix C, The Autodesk AutoCAD 2019 Certification, shows you where in the book the learning objectives are covered for the Certified User and Certified Professional Exams. If you want to get certified, this information will be very useful.

Where to Get the Exercise Files and Bonus Chapters

Many of the exercises in this book make use of sample files that you can download from the following website: www.sybex.com/go/masteringautocad2019. With these files, you can pick up an exercise anywhere you like without having to work through the book from front to back. You can also use these sample files to repeat exercises or to just explore how files are organized and put together. You can also download additional bonus chapters that cover other AutoCAD features from www.omura.com/chapters. The bonus chapters are as follows:

Bonus Chapter 1, Using the Express Tools, gives you a gentle introduction to the world of AutoCAD customization. You'll learn how to load and use existing Express tools that expand the software's functionality, and you'll be introduced to AutoLISP as a tool to create macros.

Bonus Chapter 2, Exploring AutoLISP, is a primer to this popular macro language found in AutoCAD. You'll learn how you can create custom commands built on existing ones and how you can retrieve and store locations and other data.

Bonus Chapter 3, Hardware and Software Tips, provides information about hardware related to AutoCAD. It also offers tips on improving the performance of AutoCAD and troubleshooting and provides more detailed information on setting up the plotting feature.

Bonus Chapter 4, System Variables and Dimension Styles, provides a reference to dimension style settings.

Bonus Chapter 5, Understanding Plot Styles, discusses methods for controlling lineweights and shading in your printer output.

Bonus Chapter 6, Rendering 3D Drawings, shows how you can use AutoCAD to produce lifelike views of your 3D drawings.

Bonus Chapter 7, Keeping a Project Organized with Sheet Sets, shows you how to use the Sheet Set Manager to simplify your file management. By using the Sheet Set Manager, you can automate some of the tedious drawing coordination tasks.

THE AUTOCAD FREE TRIAL

If you don't have AutoCAD, you can download and install a trial version from the Autodesk website (www.autodesk.com). Be aware that the trial is good for only 30 days and cannot be reinstalled to add time to the trial period—don't start to use it until you're certain you'll have plenty of free time to practice using AutoCAD.

FREE AUTODESK SOFTWARE FOR STUDENTS AND EDUCATORS

The Autodesk Education Community is an online resource with more than five million members that enables educators and students to download—for free (see the website for terms and conditions)—the same software used by professionals worldwide. You can also access additional tools and materials to help you design, visualize, and simulate ideas. Connect with other learners to stay current with the latest industry trends and get the most out of your designs. Get started today at www.autodesk.com/joinedu.

The Minimum System Requirements

This book assumes that you have a Windows‐based PC with at least a dual‐core processor or equivalent CPU. Your computer should have at least one DVD drive and a hard disk with 4 GB or more of free space for the AutoCAD program files and about 200 MB of additional space for sample files and the workspace. In addition to these requirements, you should have enough free disk space to allow for a Windows virtual memory page file that is about 1.5 times the amount of installed RAM. Consult your Windows manual or Bonus Chapter 3, Hardware and Software Tips, available at www.omura.com/chapters, for more on virtual memory.

AutoCAD 2019 runs best on systems with at least 4 GB or more of RAM. Your computer should also have a high‐resolution monitor and an up‐to‐date display card. An HD/VGA display with a resolution of 1366×768 or greater will work fine with AutoCAD, but if you want to take full advantage of the 3D features, you should have a 128 MB or greater, OpenGL‐capable, workstation‐class graphics card. We also assume that you're using a mouse and have the use of a printer or a plotter. Finally, you'll need an Internet connection to take full advantage of the support offerings from Autodesk.

If you want a more detailed explanation of hardware options with AutoCAD, see Bonus Chapter 3. You'll find a general description of the available hardware options and their significance to AutoCAD.

Doing Things in Style

Much care has been taken to see that the stylistic conventions in this book—the use of uppercase or lowercase letters, italic or boldface type, and so on—are the ones most likely to help you learn AutoCAD. On the whole, their effect should be subliminal. However, you may find it useful to be conscious of the following rules:

Menu selections are shown by a series of options separated by the ➢ symbol (for example, choose File ➢ New). These are typically used to show selections from a context menu or the Application menu, which you will learn about in Chapter 1.

Keyboard entries are shown in boldface (for example, enter Rotate↵).

Command‐line prompts are shown in a monospaced font (for example, Select objects:).

For most functions, this book describes how to select options from Ribbon panels and the Application menu. In addition, where applicable, we include related keyboard shortcuts and command names in parentheses. These command names provide continuity for readers who are accustomed to working at the Command prompt.

New Features of AutoCAD 2019

AutoCAD 2019 has a long list of new features, many of which are aimed at making your work easier and faster. Some features, like Autodesk 360® and Autodesk Exchange, are web tools that help you share your work, keep up with the latest on AutoCAD, and discuss issues you may be having. Here are some of the new features that we cover in this book:

External Reference Layer Controls

Improved 2D and 3D display quality and performance

View to viewport integration

Drawing Compare tool

View sharing over the internet

Contact the Authors

We hope that Mastering AutoCAD 2019 and AutoCAD LT 2019 will be of benefit to you and that, after you've completed the exercises, you'll continue to use the book as a reference. If you have comments, criticism, or ideas about how the book can be improved, you can email us at the following addresses:

George Omura: [e-mail]

Brian C. Benton: bbenton@cad‐a‐blog.com

If you find errors, please let our publisher know. Visit the book's web page, www.sybex.com/go/masteringautocad2019, and click the Errata link to find a form to use to identify the problem.

And thanks for choosing Mastering AutoCAD 2019 and AutoCAD LT 2019.

Part 1

The Basics

Chapter 1: Exploring the Interface

Chapter 2: Creating Your First Drawing

Chapter 3: Setting Up and Using the Drafting Tools

Chapter 4: Organizing Objects with Blocks and Groups

Chapter 5: Keeping Track of Layers and Blocks

Chapter 1

Exploring the Interface

Before you can start to use the new capabilities of the AutoCAD® 2019 software, you must become familiar with the basics. If you're completely new to AutoCAD, you'll want to read this first chapter carefully. It introduces you to many basic operations of AutoCAD, such as opening and closing files, getting a close‐up look at part of a drawing, and changing a drawing. If you're familiar with earlier versions of AutoCAD, you should review this chapter anyway to get acquainted with the features that you haven't already used.

AutoCAD 2019 offers updates that cover a wide range of features. The Layer Manager includes controls for managing external reference layers. Views and viewports are easier to create and retrieve. A Drawing Compare feature has been added to allow you to quickly visualize changes in a drawing. 3D Graphics performance has been enhanced. Finally, 4K monitor support has been introduced in the form of updated icons and dialog boxes. Before you begin the exercises in this chapter, make sure that you have loaded the sample files from this book's web page at www.sybex.com/go/masteringautocad2019. See the introduction for details. If you have purchased the e‐book version, please see the introduction for instructions on how to download the sample files.

IN THIS CHAPTER, YOU WILL LEARN TO

Use the AutoCAD window

Get a closer look with the Zoom command

Save a file as you work

Make changes and open multiple files

Taking a Guided Tour

First, you'll get a chance to familiarize yourself with the AutoCAD screen and how you communicate with AutoCAD. As you do the exercises in this chapter, you'll also get a feel for how to work with this book. Don't worry about understanding or remembering everything you see in this chapter. You'll get plenty of opportunities to probe the finer details of the program as you work through the later chapters. To help you remember the material, we have included a brief set of questions at the end of each chapter. For now, just enjoy your first excursion into AutoCAD.

AUTOCAD REFERENCES IN THIS BOOK

In this chapter and throughout the rest of the book, when we say AutoCAD, we mean both AutoCAD and AutoCAD LT®. Some topics apply only to AutoCAD. In those situations, you'll see an icon indicating that the topic applies only to AutoCAD and not to AutoCAD LT. If you're using AutoCAD LT 2019, these icons can help you focus on the topics that are more relevant to your work by letting you skim over items that do not apply.

AutoCAD 2019 is designed to run on Windows 7, Windows 8, Windows 8.1, and Windows 10. This book was written using AutoCAD 2019 running on Windows 7 Professional.

Launching AutoCAD

If you've already installed AutoCAD (see Appendix B, Installing and Setting Up AutoCAD) and are ready to jump in and take a look, proceed with the following steps to launch the program:

Choose Start ➢ All Programs ➢ Autodesk ➢ AutoCAD 2019 ➢ AutoCAD 2019. You can also double‐click the AutoCAD 2019 icon on your Windows Desktop. AutoCAD LT users will use AutoCAD LT 2019 in place of AutoCAD 2019.

The AutoCAD Start tab appears, offering options to open existing drawings or to create a new drawing. You may also see the Design Feed panel, which allows you to use a cloud‐based collaboration feature. Click the Start Drawing thumbnail in the left side of the view under Get Started (see Figure 1.1).

AutoCAD window displaying the Start Drawing thumbnail under Get Started (left); Recent Documents, such as 04b-bath, Floor Plan Sample, and Assembly Sample (middle); and Notifications and Connect (right).

FIGURE 1.1 The Start tab offers easy access to previous work

The AutoCAD window displays a blank default document named Drawing1.dwg. Users may see the Sheet Set Manager palette to the left of the AutoCAD window. In brand‐new installations, you will see the Design Feed panel. Close the Design Feed panel for now. AutoCAD LT users may see the Info palette to the left of the AutoCAD window.

If you're using the trial version, you'll see the Product License Activation window before step 2. This window shows you the number of days you have left in the trial version. You can also activate the product here if you purchase a license. Click the Try button to continue opening the program. Now let's look at the AutoCAD window in detail. Don't worry if it seems like a lot of information. You don't have to memorize it, but by looking at all of the parts, you'll be aware of what is available in a general way.

The AutoCAD Window

The AutoCAD program window is divided into several parts:

Application menu

Quick Access toolbar

InfoCenter

Ribbon

Drawing tabs

Drawing area

UCS icon (User Coordinate System icon)

Viewport controls

ViewCube®

Navigation bar

Command window

Status bar

Figure 1.2 shows a typical layout of the AutoCAD program window. You can organize the AutoCAD window into any arrangement you want and save it as a workspace. You can save and recall a workspace at any time using the Workspace Switching tool in the Quick Access toolbar. (You'll learn more about this tool in the next chapter.) The default workspace in Figure 1.2 is called the Drafting & Annotation workspace, and it is one of several workspaces built into AutoCAD.

Typical layout of the AutoCAD program window with lines indicating the Application menu, Quick Access toolbar, Drawing Tabs, InfoCenter, Ribbon, UCS, Viewport controls, Status window, Command window, etc.

FIGURE 1.2 A typical arrangement of the elements in the AutoCAD window

AUTOCAD FOR 3D

For 3D modeling work, AutoCAD offers the 3D Modeling workspace and 3D drawing templates. The combination of these two features can make AutoCAD look like a very different program, but beneath the different appearance, the underlying program is the same. You'll learn more about workspaces and templates later in this chapter and in Chapter 24, Customizing Toolbars, Menus, Linetypes, and Hatch Patterns. Part 4 of this book shows you the 3D features and tools of AutoCAD in more detail.

In the upper‐left corner of the AutoCAD program window, the red AutoCAD icon displays the Application menu, which offers a set of options not directly related to drawing; we'll elaborate on this menu in the next section. The Quick Access toolbar at the top of the drawing area (shown in Figure 1.3) includes the basic file‐handling functions, which you find in nearly all Windows programs. The InfoCenter is the AutoCAD online help facility; you'll learn more about it in Chapter 2, Creating Your First Drawing. The Ribbon uses icons to provide nearly all of the commands that you'll need; you'll learn more about it in the section Using the Ribbon later in this chapter.

Top portion of the AutoCAD window displaying quick access toolbar, InfoCenter, ribbon panel title bars, ribbon tabs, and ribbon panels.

FIGURE 1.3 The Quick Access toolbar, featuring basic Windows file‐handling functions, appears above the Ribbon

The drawing area occupies most of the screen. Everything you draw appears in this area. As you move your mouse around, crosshairs appear to move within the drawing area. This is the drawing cursor that lets you point to locations in the drawing area. You'll get your first chance to work with the drawing area later in the section Picking Points in the Drawing Area.

Just above the drawing area are the Drawing tabs that let you create new drawings or switch between open drawings in a way similar to popular web browsers. Notice the X in the current tab, which lets you close the current drawing, and the plus icon just to the right of the tab, which lets you create a new drawing or open an existing one. When you click the plus icon, a new drawing tab appears that you can save as a new file. Right‐click the plus icon and a context menu opens that offers you the option to open an existing drawing or to create a new one in the form of an additional tab by using a template.

If you hover over the Drawing tab, you'll see preview images of the model and layouts of the drawing. You'll learn more about model and layout spaces later in this chapter.

Within the drawing area, you see several items along the side and in the corners. The UCS icon appears in the lower‐left corner. You'll learn more about the UCS icon in a moment. In the upper‐right corner, you see the ViewCube. The ViewCube is primarily for 3D modeling, and we look at those techniques in Chapter 20, Creating 3D Drawings. You'll also see a Navigation bar along the right edge of the AutoCAD window. This bar offers tools that you can use to get around in your drawing. Basic tools like Zoom and Pan can be found here as well as some advanced tools for viewing 3D models.

The Viewport controls in the upper‐left corner of the drawing area offer menu options to control 3D and 2D views and visual styles, and they duplicate some of the functions of the ViewCube. You'll explore the Viewport controls when you delve into 3D modeling in Chapter 23, Exploring 3D Mesh and Surface Modeling.

Just below the drawing area in the lower‐left corner are the Model and Layout tabs. These tabs enable you to switch quickly between different types of views called the model and layout views. You'll get to see firsthand how these views work in a section called Working with AutoCAD later in this chapter.

The Command window, located just below the drawing area, gives you feedback about the AutoCAD commands as you use them. You can move and resize this window just as you move and resize other display components. The Command window can be placed in a docked position as shown in Figure 1.4 by dragging it into the status bar. We'll elaborate on the Command window in the section Working in the Command Window later in this chapter.

Bottom portion of the AutoCAD window displaying the command window, status bar, model and layout tabs (encircled), and USB icon.

FIGURE 1.4 The Command window and the status bar

Below the Command window is the status bar (also shown in Figure 1.4). The status bar gives you information at a glance about the state of the drawing. The tools in the status bar offer aids to the drafting process.

Using the Application Menu

The Application menu offers tools to help you manage your AutoCAD files. It is basically the File pull‐down menu from earlier versions of AutoCAD. Try it out to see how it works:

Click the Application menu icon in the upper‐left corner of the AutoCAD window. A list of options appears.

Move the cursor slowly down the list of options in the left column. As you highlight the options, additional options appear in a column to the right.

Highlight the Export option to see the various formats available for export (see Figure 1.5).

Export option in the Application menu with various formats available for export, namely, DWF, DWFx, 3D DWF, PDF, DGN, and Other Formats on the right.

FIGURE 1.5 The Export option in the Application menu showing the list of export options

The Application menu also gives you a convenient way to find recently used files or to get to a file you already have open. If you move your cursor away from the list of options to the left in the Application menu, you'll see Recent Documents in the upper‐left portion of the menu. You'll also see two icon tools, named Open Documents and Recent Documents (see Figure 1.6).

Application menu with Open documents and Recent documents icons on the upper-left portion and a list of recent documents (Floor Plan Sample.dwg, Data Extraction and Multileaders Sample.dwg, etc.) on the right.

FIGURE 1.6 The Open Documents and Recent Documents tools

The Open Documents option lets you quickly change from one open file to another when you are viewing your files full‐screen. The Recent Documents option displays a list of documents on which you've recently worked.

View tool icon. You can use the View tool in the upper‐right portion of the Application menu to select the way the list of files is displayed in a manner similar to the way you would use the Windows Explorer View option. You can click this icon and select Small Images to have the list display the files with thumbnail images of their content. Hover over a filename and you will see a tool tip that displays a larger thumbnail of the drawing.

Using the Ribbon

The most prominent feature in the AutoCAD window, besides the drawing area, is the Ribbon (see Figure 1.7). This is where you'll be selecting tools to draw, edit, or perform other functions. The Ribbon contains a set of panels representing groups of tools and features. The name of each Ribbon panel is found in its title bar at the bottom of the panel. Tabs that appear above the Ribbon panels further organize them. Each tool in the Ribbon offers a tool tip and cue card that provides a short description to help you understand what the tool icon represents.

Upper left portion of the AutoCAD window with highlighted Polyline tool in the ribbon panel displaying a typical cue card with labels Tool name and Description/tutorial.

FIGURE 1.7 A typical cue card from a Ribbon panel tool

Arrowhead button icon. If you see only the Ribbon tabs, click the arrowhead button in the Ribbon Control tool. If you don't even see the tabs, type Ribbon ↵.

Move the arrow cursor onto one of the Ribbon panel tools and leave it there for a moment; you'll see a tool tip appear just below the cursor. Hold the cursor there a bit longer and the tool tip changes to give you even more information about the tool.

In most cases, you'll be able to guess what each tool does by looking at its icon. The icon with an arc in the Draw Ribbon panel, for instance, indicates that the tool draws arcs; the one with the circle shows that the tool draws circles; and so on. For further clarification, the tool tip gives you the name of the tool.

COMMUNICATING WITH THE COMMAND WINDOW AND DYNAMIC INPUT DISPLAY

AutoCAD is the perfect servant: It does everything you tell it to do and no more. You communicate with AutoCAD by using tools and menu options, which invoke AutoCAD commands. A command is a single‐word instruction you give to AutoCAD telling it to do something, such as draw a line (the Line tool in the Draw Ribbon panel) or erase an object (the Erase tool in the Modify Ribbon panel). Whenever you invoke a command, either by typing it or by selecting an option or tool, AutoCAD responds by presenting messages to you in the Command window and the Dynamic Input display or by displaying a dialog box. The Dynamic Input display is the display of information that appears at the cursor and consists of messages, dimensions, and coordinates.

The messages in the Command window, or in the Dynamic Input display, often tell you what to do next, or they may display a list of available options. A single command often presents a series of messages that you answer to complete the command. These messages serve as an aid to new users who need a little help. If you ever get lost while using a command or forget what you're supposed to do, look at the Command window for clues. As you become more comfortable with AutoCAD, you'll find that you won't need to refer to these messages as frequently.

You can also right‐click to display a set of options that relate directly to your current activity. For example, if you right‐click before picking the first point for the Rectangle command, a set of options appears displaying the same options that are listed in the Command prompt along with some additional options.

Finally, the Dynamic Input display allows you to enter dimensional data of objects as you draw them. Besides echoing the command‐line messages, the Dynamic Input display shows temporary dimensions, coordinates, and angles of objects that you're drawing and editing. As you enter coordinate or angle values through the keyboard, they appear in the Dynamic Input display. You can easily turn the Dynamic Input display on or off by clicking the Dynamic Input tool when it is visible in the status bar or by setting the Dynmode command to 0 for off or 3 for on. When the Dynamic Input display is turned off, your keyboard input appears only in the Command window.

As a new user, you'll find these tool tips helpful because they show you the name of the tool and a brief description of how to use it. Typically, when we ask you to select a tool, we'll use the name shown in the tool tip to help you identify the tool. In the case of a tool with flyouts, the tool name changes under different conditions. For those tools, we'll use a general description to identify the tool. You'll learn more about flyouts a bit later in this chapter (see the section Understanding Flyouts).

As you work through this book, we'll ask you to select tools from the Ribbon panels. You'll often be asked to switch between different tabs to select tools from other sets of panels. To make the process simpler to read, we'll use a somewhat abbreviated description of a tool's location. For example, for the Line tool we'll say, Click the Line tool in the Home tab's Draw panel. For the Move tool, we'll say, Click the Move tool in the Home tab's Modify panel.

EXPANDING HIDDEN PANELS

In addition to the visible tools, some buttons are hidden from view. You can expand many of the Ribbon panels to select more of them. If you see an arrowhead to the right of a panel's title bar, you can click the title bar to expand the panel (see Figure 1.8). The panel expands to reveal additional tools. If you move the cursor to the drawing area, the expanded panel shrinks to its original size. You can also click the pushpin icon in the expanded panel title bar to lock the panel in its open position.

Left portion of the AutoCAD ribbon with a mouse pointer in the Draw panel (top left) and the expanded Draw panel with additional tools and pushpin icon at the bottom (bottom right).

FIGURE 1.8 The arrowhead in the panel title bar tells you that additional tools are available

From now on, we'll refer to the location of additional tools as the expanded panel. For example, we'll say, Click the Ray tool in the expanded Draw panel when we want you to select the Ray tool.

If you are working on a smaller screen with low resolution, some of the Ribbon panels to the far right may look different from what you are shown in this book. On a low‐resolution screen, AutoCAD will automatically reduce the size of the panels to the right of the Ribbon so that they show only their title (see Figure 1.9).

Image described by caption.

FIGURE 1.9 The Layers, Block, Properties, Groups, Utilities, Clipboard, and View panels are reduced to single icons with a smaller AutoCAD window

To see the tools, hover over the panel (see Figure 1.10).

The Layers, Block, Properties, Groups, Utilities, Clipboard, and View panels in AutoCAD ribbon, with a mouse pointer on the Utilities panel with tools, such as Measure, ID Point, and Point Style….

FIGURE 1.10 Hover over the panel to see the tools

Finally, the Workspace drop‐down menu in the Quick Access toolbar may be hidden from view in a low‐resolution display. If you don't see these options in your AutoCAD window, click the double arrowhead icon to the far right of the Quick Access toolbar to reveal it. If you still don't see the Workspace menu, click the downward‐pointing arrow icon at the far‐right end of the Quick Access toolbar and select Workspace. See Can't Find the Tool or Panel We're Discussing? later in this chapter for more on missing interface items.

UNDERSTANDING FLYOUTS

The flyouts are one more feature that you'll want to know about. Flyouts are similar to expanded panels because you can click an arrowhead to gain access to additional tools. Unlike a whole panel, however, flyouts give you access to different methods for using a particular tool. For example, AutoCAD lets you draw circles in several ways, so it offers a flyout for the Circle tool in the Home tab's Draw panel. If you click the arrowhead below the Circle icon in the Draw panel, you'll see additional tools for drawing circles (see Figure 1.11).

Left portion of AutoCAD ribbon displaying a mouse pointer in the flyout arrowhead below the Circle icon in the Draw panel (left) and a list of tools under the Circle icon with 2-Point being highlighted (right).

FIGURE 1.11 Flyouts

If you select a tool option from a flyout, that option becomes the default tool for the icon you chose. For example, when you hover your cursor over the Circle icon in the Draw panel, the tool tip shows Center, Radius for the tool's name. If you click the arrowhead below the Center, Radius tool and select 2‐Point, then 2‐Point becomes the default tool and you'll see 2‐Point for the name of the tool in the tool tip (see Figure 1.12).

A mouse pointer on the (left) Circle icon with description box for Center, Radius (middle), 2-point tool in the flyout (middle), and (right) circle icon with description box for 2-Point.

FIGURE 1.12 The tool with a flyout will change to the last tool used

GENERAL TOOL NAMES VS. TOOL TIP NAMES

Because the tool tip for tools with flyouts can change, describing them by name can be a bit problematic. The name may have changed based on the last tool you used from a flyout. For this reason, if a tool has a flyout, we'll refer to it by a general name that is related to the set of tools contained within it rather than by the tool tip name. For example, we'll call the circle icon tool the Circle tool rather than the Center, Radius tool.

Draw panel with the Circle tool being encircled.

TOOLS VS. THE KEYBOARD

Throughout this book, you'll be told to select tools from the Ribbon panels to invoke commands. For new and experienced users alike, the Ribbon panels offer an easy‐to‐remember method for accessing commands. If you're an experienced AutoCAD user, you can type commands directly from the keyboard. Most of the keyboard commands you know and love still work as they did before.

Many tools and commands have aliases. Aliases are one‐, two‐, or three‐letter abbreviations of a command name. As you become more proficient with AutoCAD, you may find these aliases helpful. As you work through this book, the shortcuts will be identified for your reference.

Finally, if you're feeling adventurous, you can create your own aliases and keyboard shortcuts for executing commands by adding them to the AutoCAD support files. Chapter 24 discusses how to customize menus, Ribbon panels, toolbars, and keyboard shortcuts.

Picking Points in the Drawing Area

Now that you've seen the general layout of AutoCAD, take a look at the coordinate readout and the drawing cursor to get a sense of how the parts of the AutoCAD screen work together:

Move the cursor around in the drawing area. As you move it, notice how the coordinate readout changes to tell you the cursor's location. It shows the coordinates in an X, Y, Z format. If the coordinates are not shown on the status bar, click the customization tool at the bottom‐right corner of the AutoCAD window and click the Coordinates option check mark. The coordinate readout will then be visible. The Customization tool looks like three horizontal bars. See Can't Find the Tool or Panel We're Discussing? later in this chapter for more information.

Place the cursor in the middle of the drawing area and click the left mouse button. Move the cursor and a rectangle follows. This is a window selection; you'll learn more about this window in Chapter 2. You also see a coordinate readout following the cursor and the message Specify opposite corner or. This display at the cursor is called the Dynamic Input display. You'll learn more about it a little later in this chapter (see Figure 1.13).

Dynamic Input display cursor and bars for Specify opposite corner or (left), 14.2772 (middle), and 13.2203 (right).

FIGURE 1.13 The Dynamic Input display cursor

Move the cursor a bit in any direction, and then click the left mouse button again. Notice that the window selection disappears, as does the Dynamic Input display.

Try picking several more points in the drawing area. Notice that, as you click, you alternately start and end a window selection. If you happen to click and drag, you will see a lasso selection (see Click and Drag to Lasso Objects in Chapter 2 for more on the lasso selection method).

If you happen to click the right mouse button, a context menu appears. A right‐click frequently opens a menu containing options that are context sensitive. This means the contents of the menu depend on the location where you right‐click as well as the command that is active at the time. If there are no appropriate options at the time of the right‐click, AutoCAD treats the right‐click as an Enter (↵) keystroke. You'll learn more about these options as you progress through the book. For now, if you happen to open this menu by accident, press the Esc key to close it.

Using the UCS Icon

In the lower‐left corner of the drawing area, you see an L‐shaped line. This is the User Coordinate System (UCS) icon, which tells you your orientation in the drawing. This icon becomes helpful as you start to work with complex 2D drawings and 3D models. The X and Y indicate the x‐ and y‐axes of your drawing. Chapter 21, Using Advanced 3D Features, discusses this icon in detail. For now, you can use it as a reference to tell you the direction of the axes.

IF YOU CAN'T FIND THE UCS ICON

The UCS icon can be turned on and off, so if you're on someone else's system and you don't see the icon or it doesn't look like it does in this chapter, don't panic. See Chapter 21 for more information.

UCS icon depicted by a vertical line labeled Y perpendicular to a horizontal line labeled X with the point of intersection enclosed by a square.

Working in the Command Window

As mentioned earlier, at the bottom of the screen, just above the status bar, is a small horizontal window called the Command window. Here AutoCAD displays responses to your input while you're using a command. By default, it shows one line of text. This line shows the current responses to your command input as well as command options. As you work through a command, you'll see more responses, with earlier responses scrolling upward in faded text. You can view text that has scrolled out of sight by clicking the up‐pointing arrowhead at the far right of the Command window. Right now, the command line displays the words Type a command in a box (see Figure 1.4, earlier in this chapter). This tells you that AutoCAD is waiting for a command. When you click a point in the drawing area, you see the message Specify opposite corner or [Fence/WPolygon/CPolygon]:. At the same time, the cursor starts to draw a window selection that disappears when you click another point. The same message appears in the Dynamic Input display at the cursor.

As a new user, pay special attention to messages displayed in the Command window and the Dynamic Input display because this is how AutoCAD communicates with you. Besides giving you messages, the Command window records your activity within AutoCAD. You can use the scroll bar to the right of the Command window to review previous messages. You can also enlarge the window for a better view. (Chapter 2 discusses these components in more detail.)

Now let's look at the AutoCAD window components in detail.

THE COMMAND WINDOW AND DYNAMIC INPUT DISPLAY

The Command window and the Dynamic Input display allow AutoCAD to provide text feedback on your actions. You can think of these features as a chat window for communicating with AutoCAD—as you enter commands, AutoCAD responds with messages. As you become more familiar with AutoCAD, you may find that you don't need to rely on the Command window and Dynamic Input display as much. For new and casual users, however, the Command window and Dynamic Input display can be helpful in understanding what steps to take as you work.

Working with AutoCAD

Now that you've been introduced to the AutoCAD window, you're ready to try using a few AutoCAD commands. First you'll open a sample file and make a few modifications to it. In the process, you'll become familiar with common methods of operation in AutoCAD.

Opening an Existing File

In this exercise, you'll get a chance to see and use a typical Select File dialog box.

Before you start, make sure that you have installed the sample files for this book from the book's web page. See the introduction for instructions on how to find the sample files.

To start, you'll open an existing file:

Close icon. In the Drawing tab at the top left of the drawing area, click the Close icon to the far right of the tab.

A message appears, asking whether you want to save the changes you've made to the current drawing. Click No.

Open Files option icon. In the Start tab, click the Open Files option just below the Start Drawing icon in the left column. The Select File dialog box opens. This is a typical Windows file dialog box with an added twist: In the large Preview box on the right, you can preview a drawing before you open it, thereby saving time while searching for files. To the left is a panel known as the Places list, in which you can find frequently used locations on your computer or the Internet (see Figure 1.14).

Select file dialog box displaying History, Documents, Favorites, FTP, Desktop, and Dropbox on the (left), clip.dwg under Extra Samples (middle), and Preview and Initial view (right).

FIGURE 1.14 The Select File dialog box

If you don't see a Preview box in the Select File dialog box, click the word Views in the upper‐right corner and select Preview from the list that appears. Note that the Select File dialog box can be resized if you need to view more of your drawing list.

In the Select File dialog box, open the Look In drop‐down list and locate the Chapter 1 folder of the Mastering AutoCAD 2019 sample files. (You may need to scroll through the list to find it.)

Move the arrow cursor to the clip.dwg file and click it. Notice that the clip.dwg filename now appears in the File Name text box below the file list. The Preview box also now shows a thumbnail image of the file. Be aware that a thumbnail may not show for files from older versions of AutoCAD.

Click the Open button at the bottom of the Select File dialog box. AutoCAD opens the clip.dwg file, as shown in Figure 1.15.

Image described by caption and surrounding text.

FIGURE 1.15 The Layout1 view of the clip.dwg file

The clip.dwg file opens to display a layout view of the drawing. A layout is a type of view in which you lay out different views of your drawing in preparation for printing. You can tell you are in a layout view by the white area over the gray background. This white area represents your drawing on a printed page. This view is like a print preview.

Also note that the AutoCAD window's title bar displays the name of the drawing. The name is also displayed in the Drawing tab. This offers easy identification of the file.

This particular file contains both 2D drawings and a 3D model of a typical locking clip. The layout view shows top, front, and right‐side views as well as an isometric view.

Getting a Closer Look

One of the most frequently used commands is Zoom, which gives you a closer look at part of your drawing. This command offers a variety of ways to control your view. In this section, you'll enlarge a portion of the clip drawing to get a more detailed look. You use a zoom window to tell AutoCAD which area you want to enlarge.

You'll start by switching to a Model Space view of the drawing. The Model Space view places you in a workspace where you do most of your drawing creation and editing. Follow these steps:

Hover over the Clip tab at the top left of the drawing area (see the left panel in Figure 1.16). You'll see two preview icons showing the Model Space on the left and the layout on the right. If you hover over the Model Space image, the drawing area will temporarily change to show you the full view of the Model Space.

The Clip* tab with mouse pointer displaying the Model (left) and Layout1 (right).

FIGURE 1.16 Hover over the Drawing tab, and click the Model Space image (left)

Click the image on the left showing the Model Space (see Figure 1.16).

Your view changes to show the full 3D model with the 2D representations of the model (see Figure 1.17). You can also click the Model tab below the drawing area (see the right panel in Figure 1.16) to accomplish the same change from the layout to Model Space.

[-][SW Isometric] [2D Wireframe] window in AutoCAD displaying 3D model with 2D representations of the model.

FIGURE 1.17 3D model with 2D representations of the model

Type PLAN↵↵. Your display changes to a two‐dimensional view looking down on the drawing, as shown in Figure 1.18.

Drawing area displaying a 3D model of a clip (top) with its 2D representation enclosed in a rectangle with arrows labeled First click here … and and then click here (bottom).

FIGURE 1.18 Placing the zoom window around the clip

Click the Zoom Window tool from the Zoom flyout in the Navigation bar (see Figure 1.19). Remember that to open the flyout, you need to click the arrowhead next to or below the tool.    

Zoom flyout in the navigation bar displaying options such as Zoom Extents (selected), Zoom Window, Zoom Previous, Zoom Realtime, Zoom All, Zoom Dynamic, Zoom Scale, Zoom Center, Zoom Object, Zoom In, and Zoom out.

FIGURE 1.19 Choosing the Zoom Window tool from the Zoom flyout in the Navigation bar

You can also click the Window tool from the Zoom flyout in the View tab's Navigate panel (see Figure 1.20) or type the command Z↵W↵. If you don't see the Navigate panel, right‐click in the Ribbon and choose Show Panels ➢ Navigate.

Image described by caption.

FIGURE 1.20 The Zoom flyout and Window tool in the View tab's Navigate panel

The Dynamic Input display shows the Specify first corner: prompt. Look at the image in Figure 1.18. Move the crosshair cursor to a location similar to the one shown in the figure labeled First click here, and then left‐click. Move the cursor, and the rectangle appears with one corner fixed on the point you just picked; the other corner follows the cursor.

The Dynamic Input display now shows the Specify opposite corner: prompt. Position the other corner of the zoom window so that it encloses the lower image of the clip, as shown in Figure 1.18, and left‐click the mouse again. The clip enlarges to fill the screen.

In this exercise, you used the Window option of the Zoom command to define an area to enlarge for your close‐up view. You saw how AutoCAD prompts you to indicate first one corner of the window selection and then the other. These messages are helpful for first‐time users of AutoCAD. You'll use the Window option frequently—not just to define views but also to select objects for editing.

Getting a close‐up view of your drawing is crucial to working accurately, but you'll often want to return to a previous view to get the overall picture. To do so, choose Zoom Previous from the Zoom flyout in the Navigation bar (see Figure 1.21). You may also type Z↵P↵.

Zoom flyout in the Navigation bar displaying options such as Zoom Extents, Zoom Window, Zoom Previous, and Zoom Realtime, with the Zoom Previous option pointed by the cursor.

FIGURE 1.21 The Zoom Previous option

Do this now and the previous view appears. Click Zoom Previous again, and the view showing the entire clip returns to the screen.

You can quickly enlarge or reduce your view by using the Zoom Realtime option of the Zoom command. Follow these steps to change your view with Zoom Realtime:

Zoom Realtime option icon. Click the Zoom Realtime option from the Navigation bar's Zoom flyout. You can also type Z↵.

Zoom Realtime cursor icon. Place the Zoom Realtime cursor slightly above the center of the drawing area, and then click and drag downward. Your view zooms out to show more of the drawing.

While still holding the left mouse button, move the cursor upward. Your view zooms in and enlarges. When you have a view similar to the one shown in Figure 1.22, release the mouse button. (Don't worry if you don't get exactly the same view as the figure. This is just for practice.)

Drawing area displaying the final view of the clip in 3D (top) and 2D (bottom).

FIGURE 1.22 The final view you want to achieve in step 3 of the exercise

You're still in Zoom Realtime mode. Click and drag the mouse again to see how you can further adjust your view. To exit, you can select another command besides Zoom or Pan, or press the Esc key twice.

If you prefer, you can use the wheel on your mouse to zoom and pan over your view. Roll the wheel to zoom in and out, or click and drag the wheel to pan. Be aware that Zoom Realtime offers finer control over the amount of magnification than does the mouse wheel.

As you can see from this exercise, you have a wide range of options for viewing your drawings just by using a few tools. These tools are all you need to control the display of 2D drawings.

Saving a File as You Work

It's a good idea to save your file periodically as you work on it. As with any Windows program, you can save it under its original name (click the Save tool on the Quick Access toolbar) or under a different name (choose Save As from the Application menu or the Quick Access toolbar), thereby creating a new file.

By default, AutoCAD automatically saves your work at 10‐minute intervals under a name that is a combination of the current filename plus a number and that ends with the .sv$ filename extension. This is known as the Automatic Save feature. Using settings in the Options dialog box or system variables, you can change the name of the autosaved file and control the time between autosaves. See The Open And Save Tab in Appendix B for details.

I CAN'T FIND MY AUTOMATIC SAVES!

As an IT manager at ELS Architecture and Urban Planning, this author (George) is often asked, Where does AutoCAD put the Automatic Save files? By default, in Windows 7, Windows 8, and Windows 10 the Automatic Save file is stored in C:\Users\User Name\appdata\local\temp\. You can find the exact location for your system by typing Savefilepath↵ at the Command prompt. This file location is often set as a hidden folder, so you may need to set up File Explorer to display hidden folders before you can get to the Automatic Save file. You can also specify a different location for the Automatic Save files. See Appendix B for information on how to locate hidden files and specify a location for your files.

Making Changes

You'll frequently make changes to your drawings. One of the primary advantages of AutoCAD is the ease with which you can make modifications. The following exercise shows you a typical sequence of operations involved in changing a drawing:

Use the Save As option in the Application menu to save the current clip.dwg file under the name MyFirst. For convenience, you can save your files in the My Documents folder.

Erase tool icon. From the Home tab's Modify panel, click the Erase tool.

Notice that the cursor has turned into a small square. This square is called the pickbox. You also see Select objects: in the Command window and the Dynamic Input display. This message helps remind new users what to do.

Move the pickbox over the drawing, placing it on various parts of the clip. Don't click anything yet. Notice that as you hover your cursor over objects with the pickbox, they're dimmed and a red X appears by the cursor. This helps you see the objects that the pickbox is likely to select and erase should you click the left mouse button.

Place the pickbox on the crosshatch pattern of the clip